[PATCH] D36433: [KnownBits][ValueTracking] Move the math for calculating known bits for add/sub into a static method in KnownBits object

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
Herald added a subscriber: mgorny.

I want to reuse this code in SimplifyDemandedBits handling of Add/Sub. This will make that easier.

Wonder if we should use it in SelectionDAG's computeKnownBits too.


https://reviews.llvm.org/D36433

Files:
  include/llvm/Support/KnownBits.h
  lib/Analysis/ValueTracking.cpp
  lib/Support/CMakeLists.txt
  lib/Support/KnownBits.cpp

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